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Editorial Team
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Asked: 2026-06-01T09:24:50+00:00

I want to create a native (c++) module for node.js which is able to

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I want to create a native (c++) module for node.js which is able to send sockets to another node process, which is completely unrelated to the current process. To do so, I tought of using the ancillary library, which has a really, really easy API for this. The problem I have to solve now is how I can get the fd or the handle of a socket object of node.js.

There’s a TCPWrap class in tcp_wrap.cc & tcp_wrap.h, which has a property called handle_, which holds a uv_tcp_t object from libuv, but that property is private. Also I can’t #include because it’s just a module of node.js an not directly in node.js itself. I don’t know if it’s a good idea to copy the source files to my module just to get the that class…

Have you any ides how I could do it?

I doesn’t have to run on winows, tough.

Thanks!

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1 Answer

  1. Editorial Team

    I finally found a way to do it. You can find the node module here:
    https://github.com/VanCoding/node-ancillary

    I’ve just taken the headers “tcp_wrap.h”,”stream_wrap.h” and “handle_wrap.h” and then included “tcp_wrap.h”.

    I could then get the object the following way:

    TCPWrap* wrap = static_cast<TCPWrap*>(args[0]->ToObject()->GetPointerFromInternalField(0));
StreamWrap* s = (StreamWrap*)wrap;

    The following code then gives access to the file descriptor

    s->GetStream()->fd
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